I decided to Dyno my YFZ450 for the first time and I was very impressed on how well it did for a pump gas quad. It was 104 degrees in the dyno room Max Power 54.27hp@10100rpm, Max Torque 32.78@7800rpm, My air/fuel was at 12, a little rich. The kid that runs the dyno told me with a little tuning he could get another two more horse power out of it. With a 160lb rider it was kicking ***, there were a few big bore high compression 450r Honda's and YFZ450's that couldn't catch or beat my stock bore
YFZ450......
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